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How Does Baby Sizing Work?

How Does Baby Sizing Work?

Whether you’re gifting a baby or buying for your own bump, understanding clothing sizes can feel a little confusing. Ready for a quick primer? Here are four key things to remember:

1. Even though baby clothes are sold by ‘age’, they’re really broken into groups based on the baby’s height and weight. Babies grow at all different speeds! So it’s totally possible that your sister’s cherubic six-month-old fits into clothes sized 12-18 months. You can check a sizing chart (ours is below!) to ensure a perfect fit.

2. When gifting, it’s a good idea to buy ahead of baby’s current age so that they have plenty of time to wear and grow into the clothes. (Don’t forget to think about what season it’ll be when they wear them!)

3. For shower gifts or babies on the way, buying size newborn usually gives you enough wiggle room since newborn clothes fit a wide range—babies around five to nine pounds.

4. If you’re not sure about the baby’s age, length or weight (your boss isn’t big on small talk) you’ve got a few options: Buy extra big (they’ll grow into it eventually!), make sure there’s a flexible return policy, or go for a cozy blanket or cute set of burps or bibs.

Take a peek at how Monica + Andy’s sizing works!

Preemie: Up to five pounds and 17 inches

Newborn: 5 to 9 pounds, or up to 20 inches

0-3 Months: 9 to 12 pounds, 18 to 23 inches

3-6 Months: 12 to 16 pounds, 23 to 26 inches

6-9 Months: 16 to 20 pounds, 26 to 28 inches

9-12 Months: 20 to 24 pounds, 28 to 30 inches

12-18 Months: 24 to 27 pounds, 30 to 31 inches

18 to 24 Months: 27 to 30 pounds, 31 to 33 inches

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